Question

How to get a list of all supported filters in PHP

Answer 1

echo "<pre>";
print_r(filter_list());
echo "</pre>";

/*
run: 

Array
(
    [0] => int
    [1] => boolean
    [2] => float
    [3] => validate_regexp
    [4] => validate_url
    [5] => validate_email
    [6] => validate_ip
    [7] => string
    [8] => stripped
    [9] => encoded
    [10] => special_chars
    [11] => full_special_chars
    [12] => unsafe_raw
    [13] => email
    [14] => url
    [15] => number_int
    [16] => number_float
    [17] => magic_quotes
    [18] => callback
)


*/

 

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